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Mohammad Arkani, Hossein Khalafi, Naser Vosoughi and Samad Khakshournia

References [1] Arkani, M., Hassanzadeh, M., Khakshournia, S. (2016). Calculation of six-group importance weighted delayed neutron fractions and prompt neutron lifetime of MTR research reactors based on Monte Carlo method. Progress in Nuclear Energy , (88), 352–363. [2] Thie, J.A. (1963). Reactor Noise . New York: Rowman and Littlefield Inc. [3] Uhrig, R.E. (1970). Random Noise Techniques in Nuclear Reactor Systems . New York: The Ronald Press Company. [4] Williams, M.M.R. (1974). Random Process in Nuclear Reactors . Pergamon Press

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Krzysztof Skorupski

: Relation between morphology and physical properties. J. Colloid Interface Sci., 229(1), 261-273. [22] Skorupski, K., Mroczka, J., Wriedt, T., Riefler, N. (2014). A fast and accurate implementation of tunable algorithms used for generation of fractal-like aggregate models. Physica A, 404, 106-117. [23] Van Poppel, L.H., Friedrich, H., Spinsby, J., Chung S.H., Seinfeld J.H., Buseck P.R. (2005). Electron tomography of nanoparticle clusters: Implications for atmospheric lifetimes and radiative forcing of soot. Geophys. Res. Lett., 32(24), 1

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Jingsong Li, Andreas Reiffs, Uwe Parchatka and Horst Fischer

the Southern Atlantic boundary layer: unexpected deviations of photochemical steady state. Atmos. Chem. Phys., 11, 8497‒8513. [28] Hastie, D. R., Shepson, P. B., Reid, N., Roussel, P. B., Melo, O. T. (1996). Summertime NOx, NOy, and ozone at a site in rural Ontario. Atmos. Environ., 30, 2157‒2165. [29] Browne, E. C., Cohen, R. C. (2012). Effects of biogenic nitrate chemistry on the NOx lifetime in remote continental regions. Atmos. Chem. Phys., 12, 11917‒11932. [30] Aneja, D.S. Kim, W.L. (1997). Chameides, Trends and

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Ştefan Marian Lazăr and Elena Diaconu

Abstract

This paper aims to establish the interface conditions influence on the flexible pavement structures life. The methodology consists in using the interface constitutive model available in the Alizé calculation program to calculate the stresses and strains in the flexible pavement structures.

The design criteria related to limiting fatigue cracking of asphalt layers and permanent deformations at the subgrade level from the road bed are used to estimate the flexible pavement structures lifetime.

When calculating the critical stresses and strains, most mechanical design methods of the flexible pavement structures considers that the road layers at interfaces are perfect bonded or total unbonded.

Proper modeling of the interface binding condition is an important aspect in understanding the real behaviour of in-service flexible pavement structures.

Open access

M. Drusa and J. Vlcek

Abstract

In the case of realized geotechnical monitoring (GTM) of reinforced retaining wall in difficult geological conditions is demonstrated the important role at realisation of transport infrastructures, which are often realized in insufficient quality due to inappropriate geotechnical parameters from survey works or not fitted well design of structure at certain conditions. This can result in large deformations of structure, or losing stability or structure life-time is very limited and remediation work is complicated and expensive. There was built on the modernized railway line Bratislava – Trenčín, closed to Zlatovce, overpass and connected road embankments on the route of first class I/61. Structure was designed as a bridge over the railway track before the northern portal of the railway tunnel Turecký vrch was open. A part of the embankment and overpass was a retaining wall reinforced by geosynthetics. The results of the geotechnical monitoring of this wall were afterwards simulated using finite element method (FEM) and results of this comparison are the scope of this article.

Open access

Andreea Hegyi, M. Păstrav and M. Rus

Abstract

The implementation of the sustainable development concept is nowadays a key issue in almost all human activities. For the constructions domain an European strategy has already been elaborated. Among its goals are also the use of long lasting materials and the reduction of repair costs. This paper presents an interdisciplinary study concerning the efficiency of the use of hot-dip galvanized rebar for concrete structures. Experimental results about corrosion kinetics of coated and usual steel reinforcement embedded in concrete, subjected to chlorine ions attack, are analyzed. Electrochemical methods as chronoamperometry and linear polarization have been used. Corrosion potential values recorded for galvanized steel embedded in concrete indicate an uncertain corrosion activation process up to a rate of 2.5 % calcium chloride relative to concrete. For rates of 5% CaCl2 and more the corrosion process is activated. For unprotected steel bars embedded in concrete the corrosion activation process started at all calcium chloride studied rates and higher corrosion potential values has been registered than for the hot-dip galvanized ones, at the same rates. Economical assessments have been done using entire lifetime cost analysis of the reinforced concrete structures. Despite that the hot-dip galvanization is a rather expansive procedure, when taking into account the whole expected life span, the use of zinc coating proves to be efficient both from structural and financial approaches.

Open access

Cezar Braicu

Abstract

The advent and increasing wave of refugees arrived through various channels in Europe last year produce anxiety both in the EU leadership and in the management and organization of European states. Assessing the impact on the local labor market, on the human resources available and on the cost of insertion on the labor market in the EU it is difficult to quantify at present as long as it is not known what will be the final number of these refugees, the level of training them, and not the least the desire for integration into the European system of life and work. Prospects for reducing the number of active population in the EU in the coming years and increasing the lifetime rate require management organizations to carry out careful studies and to analyze and find solutions to integrate the active refugees in the domestic workforce, to assess the increased level training costs and integration in the local organizational culture and, not the least, the impact on the effectiveness of performed activities.

Open access

Gabriela-Maria Man and Mihaela Man

., & Willis, S. L. (2010). The Seattle Longitudinal Study of adult cognitive development. ISSBD Bulletin, 1(57), 1-10. Smart, E. L., Gow, A. J., & Deary, I. J. (2014). Occupational complexity and lifetime cognitive abilities. Neurology, 83(24), 2285-2291. Sturman, M. C. (2003). Searching for the inverted U-shaped relationship between time and performance: Meta-analyses of the experience/performance, tenure/performance, and age/performance relationships. Journal of Management, 29, 609-640. Swift H. J., Lamont, R. A., & Abrams